3D Accuracy
Convergence of 3D volume potential evaluations: higher order than expected at first, then capped at around order 3.5
| degree | l2 order | linf order |
|---|---|---|
| 0 | 1.92 | 1.76 |
| 1 | 3.39 | 3.38 |
| 2 | 3.44 | 3.38 |
| 3 | 3.44 | 3.40 |
Number of quadrature points per cell = (degree + 1)**3